Handle conditional compilation for getting TID on iOS

Author: SpriteOvO

spdlog/src/formatter/pattern_formatter/pattern/thread_id.rs

@@ -12,8 +12,8 @@ use crate::{
 ///
 /// On Linux, this pattern writes the return value of `gettid` to the output.
 ///
-/// On macOS, this pattern writes the return value of `pthread_self` to the
-/// output.
+/// On macOS and iOS, this pattern writes the return value of
+/// `pthread_threadid_np` to the output.
 ///
 /// On Windows, this pattern writes the return value of `GetCurrentThreadId` to
 /// the output.

spdlog/src/record.rs

@@ -269,7 +269,7 @@ fn get_current_tid() -> u64 {
         tid as u64
     }
 
-    #[cfg(target_os = "macos")]
+    #[cfg(any(target_os = "macos", target_os = "ios"))]
     #[must_use]
     fn get_current_tid_inner() -> u64 {
         let mut tid = 0;